You could try emailing Tommasini... I think it is Barb that has been pretty responsive regarding serial numbers, etc. Search the forums, I know the email address has been posted before. Maybe in the Tommasini lounge thread here in C&V.

They still make forks (Air?), such as this:

http://www.hibike.com/shop/product/p...bike-fork.html

Good luck. It would be a shame for such a nice bike as yours to not be able to get an acceptable replacement.